This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1985 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1986 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1987 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1988 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1989 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1990 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

This data set from the National Water Data Storage and Retrieval System contains estimates of nitrogen-fertilizer sales for the conterminous United States in 1991 as reported by the U.S. Environmental Protection Agency (1990) and by Jerald Fletcher (West Virginia University, writ...

The Maryland Biological Stream Survey (MBSS) is a multi-year probability-based sampling program designed to assess the status of biological resources in non-tidal streams of Maryland. The MBSS study area comprises eighteen drainage basins across the state of Maryland, providing ...

THE MARYLAND BIOLOGICAL STREAM SURVEY (MBSS) IS A MULTI-YEAR PROBABILITY-BASED SAMPLING PROGRAM DESIGNED TO ASSESS THE STATUS OF BIOLOGICAL RESOURCES IN NON-TIDAL STREAMS OF MARYLAND. THE MBSS STUDY AREA COMPRISES EIGHTEEN DRAINAGE BASINS ACROSS THE STATE OF MARYLAND, PROVIDING ...